How do I create a short web address

On my Joomla 3 website (https://www.m2820.com) and in the main Mega Menu at the top, if I add a new menu item by adding a "Single Articles," the web address is something like this:
www.m2820.com/articles/sunday-school/teaching-sunday-school

As you can see, it adds the full menu path since that article is within the article section on the menu, then in the sunday-school flyout menu. However, what I want is:
https://www.m2820.com/teaching-sunday-school

In other words, I want the domain name, then the article name. Nothing else.

I can currently accomplish this, this way:
1. Create a submenu
2. Place my articles in that submenu
3. Create new Mega Menu item in my main menu by linking to the articles in this submenu.

Of course, this seems like a round about way of doing this, so I'm asking, "Is there a better way of doing this? If I don't want long html address paths, what is the best way to create short paths that only include my domain name (https://www.m2820.com), plus the article name (or path)?

I would prefer to not give that information out. It is a basic question. Can you please just answer the question. If you were going to include this in a how-to tip, what would you say?

Here is the question again:
On my Joomla 3 website ( www.m2820.com ), no matter what the person clicks within the Mega Menu at the top of each page, I don't want the entire path to show in the browser address bar, but only my domain name ( www.m2820.com ) plus the article name.

So, I do NOT want this:
www.m2820.com/ articles/contact/contact-us

Instead, I want this:
www.m2820.com/contact-us

So, how to I do this with the MegaMenu?

I realize my web addresses are currently short. That is because I set them up like I described in the very first post. In other words, to create short web addresses, I first create a separate menu and link new articles to that separate menu. Then, I link the Mega Menu to that separate menu. When I do it that way, it creates the shorter web address.

So, what I'm asking is, is there an easier way of doing this? I don't want to have to first create a bunch of separate menus, then link the mega menu to those. I want to create a new article, link the mega menu to that article, AND have a short address.